#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Bindings/XPathExpression.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Tracing.h>
#include <LibWeb/WebIDL/Types.h>
#include <LibWeb/XPath/XPathExpression.h>
#include <LibWeb/XPath/XPathResult.h>

namespace Web::Bindings {

void XPathExpressionConstructor::initialize(JS::Realm& realm, JS::NativeFunction& object)
{
    auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;

    
    object.define_direct_property(vm.names.length, JS::Value(0), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.name, JS::PrimitiveString::create(vm, "XPathExpression"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<XPathExpressionPrototype>(realm, "XPathExpression"_fly_string), 0);
}

JS::ThrowCompletionOr<GC::Ref<JS::Object>> XPathExpressionConstructor::construct([[maybe_unused]] InterfaceConstructor& constructor, [[maybe_unused]] JS::FunctionObject& new_target)
{
    WebIDL::log_trace(constructor.vm(), "XPathExpressionConstructor::construct");
    return constructor.vm().throw_completion<JS::TypeError>(JS::ErrorType::NotAConstructor, "XPathExpression");
}

void XPathExpressionPrototype::initialize(JS::Realm& realm, JS::Object& object)
{
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable | JS::Attribute::Writable;

    object.set_prototype(realm.intrinsics().object_prototype());
    object.define_native_function(realm, "evaluate"_utf16_fly_string, evaluate, 1, default_attributes);

    object.define_direct_property(vm.well_known_symbol_to_string_tag(), JS::PrimitiveString::create(vm, "XPathExpression"_utf16), JS::Attribute::Configurable);
}

void XPathExpressionPrototype::define_unforgeable_attributes(JS::Realm& realm, [[maybe_unused]] JS::Object& object)
{
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;
}

[[maybe_unused]] static JS::ThrowCompletionOr<XPath::XPathExpression*> impl_from(JS::VM& vm, JS::Value js_value)
{

    if (auto impl = js_value.as_if<XPath::XPathExpression>())
        return impl.ptr();
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "XPathExpression");
}

[[maybe_unused]] static JS::ThrowCompletionOr<XPath::XPathExpression*> impl_from(JS::VM& vm)
{
    auto this_value = vm.this_value();
    if (this_value.is_nullish())
        this_value = &vm.current_realm()->global_object();
    return impl_from(vm, this_value);
}

JS_DEFINE_NATIVE_FUNCTION(XPathExpressionPrototype::evaluate)
{
    WebIDL::log_trace(vm, "XPathExpressionPrototype::evaluate");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] XPath::XPathExpression* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "evaluate");

    auto arg0 = vm.argument(0);
    auto context_node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg0.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

    auto arg1 = vm.argument(1);
    WebIDL::UnsignedShort type = 0;
    if (!arg1.is_undefined())
        type = TRY(throw_dom_exception_if_needed(vm, [&] { return WebIDL::convert_to_int<WebIDL::UnsignedShort>(vm, arg1, WebIDL::EnforceRange::No, WebIDL::Clamp::No); }));

    auto arg2 = vm.argument(2);
    GC::Ptr<XPath::XPathResult> result = nullptr;
    if (!arg2.is_undefined())
        result = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<XPath::XPathResult>> {
        GC::Ptr<XPath::XPathResult> value;

        if (!arg2.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<GC::Ref<XPath::XPathResult>> {
        if (auto impl = arg2.as_if<XPath::XPathResult>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "XPathResult");
    }());
        }
        return value;
    }(); }));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->evaluate(context_node, type, result); }));
    return JS::Value(R);
}

} // namespace Web::Bindings